$($b$)$ Using two single$-$pulse$-$width full$-$bridge inverters and an output transformer, how would you eliminate the $\backslash (3^\{\backslash$text $\{$rd $\}\}\backslash )$ and $\backslash (5^\{\backslash$text $\{$th $\}\}\backslash )$ harmonics from the output voltage of the DC$/$AC inverter without using an output filter? Draw the corresponding circuit diagram and calculate the required phase$-$shift$-$angle and pulse$-$width angle.